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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2997993eec7ba45298615a1f574e723710c3e1eb04e0bb9945210865c92a46a4' 
  AND token = 'iXuLN+T0ldrD2FbWEpAuZGk+yvR+nRhI36ZFcXNguRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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