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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1f62d3242ee53c871404e33df248a0c431ea3c377e7423ae595ab56f3fb53bd' 
  AND token = 'PR179pPQGgwUGuOpvP5TOs0CntBB0z/Oj23+NLZmTy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00101

JSON explain

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