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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecd396d4de5d5f9ec5f652ec402ef0c43162f07aca30b8dd669308c3eeaac446' 
  AND token = 'tU11q+He2UBASVE+c1TOT1klgSP7B+wL6aGEe1xFJ/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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