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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f7b5ce47592495d54603fefc5082a22eda9500f32acd5e1aa91ff3e3bae5dc9f' 
  AND token = 'kttoujxnlEORnt2Aunx6IQn+8kmXu8ep0HYHVClSRCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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