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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bd6fdb8a4da44485d6d20ab082768c992d9ebeb02696d151b30e0cd8cecfc85' 
  AND token = 'vFy6Pku4MJdM5wvP/hDQ+Nq774yeAc/qs89FuQv64p4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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