Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3a3400621e2cb236f89ecaf305852e10c038cf1f8fefd1f3fcc27cf9808499c' 
  AND token = '0w3Ku1amuQQ6CgfYm8a3VHoXmhhtp2u+w29pR3HCNj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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