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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0200469fc75d09ebd066f1fa00abda9be69d8ff6d30cff2989880743e34a32c7' 
  AND token = 'Yk12vPYzmnmFmGymmYtSKNj0gGYyuMPbEwEolZLlnFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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