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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'dc07d9ce0d6fb9fda4ab8f5435dcee481c3512ecf2ff8b50593ad701d8534dc8' 
  AND token = 'SCyo0coaWxvZFhnQgG2BhXowoNgNegXlN39wXtHXjMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00327

JSON explain

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