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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13117a97ef3de84082ab1fc85b345625b032dfbc8ceb7d26162c102882d2fc75' 
  AND token = 'pCHgdCEruUIHxez/aHLN2Hiy51E7bWGT+7E5wZ41Mos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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