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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61f4d46c55c2dca8cf8c16a8c54461f42183d52535a0f2288f6ba0b8a3eb802b' 
  AND token = 'sqiNh0QYyzoLUZxDK7YqCDkBejB/kBKJXmKGc8i0LMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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