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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f9b166f1174c3916afe1e67a0d318601e442cc11635470e50ac2afc56a75f53' 
  AND token = 'QIfV+7N8SqzQm4/U5Xlax9iXQCyp2GiEMBUNIxosQk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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