Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44c14b0eb1810863400f2673a0f844684f79200c14486b4656d0cd047631da7a' 
  AND token = 'e3K6t+jpaL9ff0s4L6pI4x1nx9J3rzQEukhN54l1u6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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