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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '25055ef9ec365b7412d5b37180b23d6dd4c01011933242bd574833ba446155ea' 
  AND token = '4BJXuGzFDLOO/JgXE4uKQh5BZ63jEqQV2x5A00m/E2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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