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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87229370f340932a95cd99ab009504dc17a4ee1588e25b3c8f2df5cbb172c17e' 
  AND token = 'LPzzuXVuY8SBKVe2hcd7CUv0KVJOIB5f93IBW63pYU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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