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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd96eefa5e40db49fb0c34fd2024b99b3611d61b6ee1ad956d56d278266f745ee' 
  AND token = 'amoWF6/Xu3H2/zoyzVF/zPajVAAJKpuMCBRwEVwLanY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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