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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cced22aa9a2658a5e41a0723bb7d4aec6a120ef5c972b07a814ca7b86063ddc7' 
  AND token = 'M8ppui3JBB9/ncn/bqxcY79/lhHXsDzRwIXKcnRwuB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}