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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130b857000d7ebde1c4568a881d6103959663ff66c0af3553d59f698d322bc6c' 
  AND token = 'aqqQQ5Ovdh5EZzQfV5ffJsM1mGQTW5Aso+BamabUxw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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