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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '33a41e6540002a99fef7cc9fd93f125317f7558e09dc083ed9b1a482cb8fe760' 
  AND token = '7W1sDrkdOWCVOAWRWNpetQSLCS+Rn/G6bwerbw7T/OQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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