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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6825cd4fa5a3246513f5d2c437404b0dc0932e165ec2a6e97fb8cfa8f17a8dbf' 
  AND token = 'leS/3AN4p/Gu2AvSf+h7yrQZl7lpK8Wh+nufgdA5DFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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