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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e711f68c8b8d88f1fcc1dac71c1fb50d39d57dde3116446c7c4a67f8ae4fcae' 
  AND token = 'oyvuHUouxeINEoVO/dof1o058q48Vkp3+wZlnQvAcIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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