Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cbd0fbc15582acd75b8838f33fc98ac0e3530b338f3584918b899c7f3dd7cd46' 
  AND token = '27EmRlOk64ZpLbpsJ/EjCrwO3S9q4dgFt/bYH3W0dMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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