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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bfa1604f433e61ea42494388c6171fc9e8dcc12c9ff1e4e78578f8d5e7d6bf7' 
  AND token = '1h5LCOMSyXqlHfMRphNjLi17pgYj9PPjoZ2qd9t13ak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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