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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '155d3d01ac3726707856b10df11c5b0d48a357404e86f14653e6f702ed5320cb' 
  AND token = 'YtKKqS1wSwU/RK1tKKZzNA8D+RP4Ko3wwfORe8d0Abs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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