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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '582062c401720c15ca26a80f55873413bac30e560b51a06905df7e6b351edafc' 
  AND token = '0WA4/SWdwQQ3Awfs+LcV4BM0+Fu7hWhfRHsJieEKcWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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