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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a61169cff7656bff352ae94e4f03d93d6a67676341eb514f4cb564593d648ded' 
  AND token = 'ZHl5of3xKCd4GAgRhce77Y42P6r7kcDgIwz5sPAtjco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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