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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47059b402206fc9238b801e4956c684a788a608b5245c162a2ddcfb77fc98cb3' 
  AND token = 'I44kkSrqylH1L8p8D4fYGX5c1xrao8nOrDzeUG6pYe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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