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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e9d7743efbbcf08fcfaa6ac6a10813085aa22a093c045188e9f25ea155cbe1a' 
  AND token = 'k6XC9iPNm4ymLlqo1TON/jPp/GLdLdW7fWkUatuP/wE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}