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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d08095b968ce3f70470ac520374fa5af01b9066dbc8c3cea463f99652a8b668' 
  AND token = 'mJH6FV2GStZdP2YZdQGeIYjz6O2Y97ZZgyQGqaYPH8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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