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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '540c589caaac6b4a7eec4022c65394e7707e756ac8e906df7ae1f16f3371c206' 
  AND token = 'tBjCIvLDEY8VDS84DaIVhu07UKxszY1Y6KdmHHXfrZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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