SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0393caa8b78470cf1b52c62e04ed457ca14e411112f856fddca0522832d50786' 
  AND token = 'wPPU2wJKlhHgiNs3JARDmHgZmOhqduAySkvOBP6hp9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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