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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'e456883f33e6b719423b7b7462b081790307311cbf5dc772c47f6c101fd27196' 
  AND token = '8yX9SSNm01xWyUQFUXtK5zmstsZGk4n9SVj0pCZ1dNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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