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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '122de9aae783d681ed15ddf12d5e89594fe66d3ea17f44e8d5be5f1b82f92968' 
  AND token = 'Lb7lDbk/z5kJTpXa04h8rV5qeB5REuSwVI3DjnqefK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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