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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7a71be65910ec1328d8ebbb8f676d9ad01e4152dea4e191898d145e9893cdbc' 
  AND token = '0vfqbdh3WKVv+sof3B/m+LoBsdx+KyUrC46kUblsTn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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