SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01503eb2ce7ff9b63ff93de3470d7883ecd8a63c9275882de18bde2d20bd1aed' 
  AND token = 'hP/GjXTFZiCUZ9s8QQYjZpGtlBJpBWARVOtoRNSUf4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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