SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '49531db645410d64deb366d6f019982c80a7d7f105c328165614fc03e226389c' 
  AND token = 'RzT7zC9u4+dbDBV6UXwqLnwm6WvpMM9AGiM2Djz+J/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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