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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89627435436025069da83e5ede58cdfcccd46a24a9fa946ffbb9412a5f8c8821' 
  AND token = 'oqX7965/CLYiWFuAu+D+4Rz1uYXx3FWiJex9D98Y7dY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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