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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c48c9d62e35b8959c7d7cdbee2897020efcbd7d3291b8f07c7624c4cbca2039' 
  AND token = 'GNloAN2ASC3PmfWk/HVyNsbBkTuKcKoIJNkCPUj+Aj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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