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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d20f95b19cece2b5e9ed25047eb53e213b98d890b825c0ed792247e610e6695' 
  AND token = 'GgF+ykPraMyzQd9m2t/ULoW6sQZNA+G5nObOhy+6lvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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