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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '4d3654e1d8def28bdc29476902a7d7781ac451aeade8c265813538bdc3a513e8' 
  AND token = 'bfaHKkbzJDxgQNjlNSJ1Rc3vNCQhR5c0u30tQoI2Lc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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