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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46bd62938ded2c61e82e1cb2488b35a136073f0c16094a75a70955c9b6fc93f2' 
  AND token = 'wGveBmJ4urmXWdL8HFBlWWPd0l72O7ob3tlMk7UScro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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