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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c0d3f4b00065e96ff2129d46ab3567d073444449a6d986eb53308867b99c11dc' 
  AND token = 'Hmi1fLdjCfEdhz6CJ+X6CjH8Un3wQpIVExh4mFWJtqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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