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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '272164cfb23b2a467bd0a719ace0e344109662f8333e07f146b5001a7966b54d' 
  AND token = 'EOO3XXF7lc4QMz778Z6BTM3x1nR5ziDj05pl4J62YDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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