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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a9d26e6c38ee4307bdfde5aa1e0b5a0801161386d7a658c7e99fe21da0bda45' 
  AND token = 'b4Q82/vcoCE8f+TV+OqyO1BHI/5zNX3YxHz8D7wqEj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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