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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c5402267b1189ef20f8be7cc092aea411e604125cbda60c626a72e0310bcdd99' 
  AND token = 'Q5Qof/x8ZOyXMBzu3xBHrrr9ZED65HqfCruM181FTmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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