SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8e1f66ce13a2fa65efae2860e7a65bc96bfcaa4c0a25acd7255e7dc860d5684' 
  AND token = '4GyamnvUvfBQYKQj3HOG9XJjHgBTwRrGIjhXyPw6ofE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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