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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aaf4bcf67695aabf7ad95a4129e26b3126e24e8d102e54bd9d271f5d81068b3' 
  AND token = 'VC6hu/aUchQRz2MEsRcSEowv2oUF7ewbH3Ib5eNNNgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00118

JSON explain

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