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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b3ff21ff56553826828eb71d71691601d71bbd55961798e0e01f39e73aff89e' 
  AND token = 'yyeWfWoI0G3kP6gwHeoxTQgbTUw6ZYLeYWScGXTxivo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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