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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'e527d506c94cb6a89d87640e48e302168cc84aa22d1ed636b6e17a9d501f25ed' 
  AND token = 'qZbpnvRbxyKSjj/5zP8hTSbEbMR1GF6geMEZJzxX0KI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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