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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '191065d5fa8dc03b82f555d16e294c9c92727099c0e5197364073b5ea0989706' 
  AND token = 'laXqyoOVLQ+bTw0myX2rl989Be7URJ6+R9juCv2yH0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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