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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '4dddd5ef8fa4a1e8289ed3f8b9715aad85e8e7d9a1479560e94bfe04fe32e269' 
  AND token = 'eAMhB5Xja/lmFDWlYgJDcslukN0D6kWw4eOO7gZ8Qq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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