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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '1be371b75fe91829b6d6e6da974dc4f9e5ce2843abbcdbc95b8b871177c10367' 
  AND token = 'uAC7tMXxNnzwtCeUMFeBToFGhdP6gON0tQ2cp4XY2KQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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