SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd74d6cac729853d18736a6243f91056183e8e29bf26c7b5cd0148bbb3e05a1c' 
  AND token = 'go1F/MCYax76hzFWb8tvTRl/C/A5uDT6XXZyqMM4J88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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