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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '870213395f58523347bd41f3e5f033484050b690511ca3b38e86190a62e3caca' 
  AND token = 'zGM+bT+tE4CVubwPz8XGCk/fzOcukRR1ZIocKtaoy+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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