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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '67b49a4be2203323c027c5fb386791165d0899257cb40b96de93776c66d1faee' 
  AND token = 'Xe5vuUCUbNQ5TEsx/U8i9MGedtQe1qPhFLDO9CkC/ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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