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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '832f43f72eb0bff7ab639c786563f52b3ba5ad2ad6848d1d1f536eb77e9e20f5' 
  AND token = 'TC7ttJdo2g3vfQEeFqao1pqgDmzC7nCqRpBP0l+XutU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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