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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cd1bdaf1cbc9e535045c54d03df25e51af884d88dce8fa51aa2de9e05ef34d1' 
  AND token = 'ZOhoss8pV126Sl9PjjntUvbZc2seYwG3PMwWcjOGq80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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