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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b1bd14d3472d89b7ae075f8de6c7bb4cbb1aaa07c837dc6676a8c56c932d987' 
  AND token = 'ty1T/GNTtg/UNYj9E3wdOaGhvpds1pgg4fWMCirXn4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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