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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1283097d8f2c37d374eca5ec01a708e4659e1f4cefb23b7b5429a2dfc330a70e' 
  AND token = 'JDUxzLUJHX0rzCZigy8F/Bjev1nyXfPce4W4NN7ndLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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