Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2f285dddacc4c7f52e8d2c5e23fc18adf9b4127d111df54502d8259364c58d6' 
  AND token = 'rAcfyXpqFqXhM/VZrOsbw+T2GeXE9CWT1J8+p49R0u8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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