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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63e29fe798562df07d9c0665f55936f232ab4b62b5420dcc91eb468b43362fb2' 
  AND token = 'tRzqM3qw0ZXL1B27ImZB8qqSw9R6Cu0vOkkNHvI3szU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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