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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22be63eace198f9b2cb561b41a482ecebebe918a04e4e5c2202ba45f40e1b152' 
  AND token = 'jZsb0KO7jTc4w9nP3fsOPLOJNfiMfZwb0+evfIBAyoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}