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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ced5ef370f4a5d7b2f5367bd296e45b58cf7f034c62e5fd1b710c9be3aea6bd1' 
  AND token = 'o24JK5R+T0XP5RjLxf6Qqq/+8IVOA+i7aVczoDRboJ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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