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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '4f20fa8f61dbf636548c3d47b56d099f3363f074e6c67d304e3e5c808ffd7e0e' 
  AND token = 'Bpd5sfJEnUPg1kVYBp33qNS2FJm4cHrBWwgmCL5n9Rk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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