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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c8ccf54e4972d1022aa0a6c32246b543d3b6a41fa8dec7d8384cf28ba2e2f0c' 
  AND token = 'V+4IGFBJRRuWrQ4XhX5mYF9UAl9P4DB2jLJ45GRG5iY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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