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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ad8a4aeb34f0081f5aef7f96753eac5749efda1bcfcef65a79de4e94eb97b93' 
  AND token = 'nbKnORWCF6v4EpZJNTzSz2pEm4KJz31sAAofihD+sNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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