SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4f1c95b38b3283254f5b14101e998b25c1e7efa7218f877431c317a0f4b70536' 
  AND token = 'kgPKNLs1bX4Xy4vYlMGv4p6ZvXDJJOJFDQFkOWCNgmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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