Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e6584e760fa47ea6743dd32fcb30b17124dfe9326323f23549757b553c89275' 
  AND token = 'l/73gm6mgbrPA4jPiQTLPrbWP+YKP09nYD3wzTI1aBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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