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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80c2333a4de8ee2b2114d67294ced69177ec61404a6389089a7ec36f4dc1aed9' 
  AND token = '34CW4xUceHcOVhUOXuUOhpdKmA6xgQZOG1HNrpC1pOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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