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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abd8ffc4ec93653d304c69d38ba55b8c6af8141cfa23df25ce1567725341151a' 
  AND token = 'K/p31QcZdSVyRxM4a39KuIA6bZ+3+RXEK3oYgqrc+u0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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