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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '231bad98dc24797f1e18b67415f8a69cfbb63f9d34d1955ca6fdb3e65b0f74ee' 
  AND token = 'dPV/D1N38jYFdOUe2D+Bw5NMDN5jbgu93RFrQ9c+r2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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