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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a1e9a949db4c8f64ccbb4a60ef5ff0885afedae64a51b32a686148bbbd38da7' 
  AND token = 'tkol26IwtHcuxbDeU7jzM2YijjLdeW30jmQKmohZOm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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