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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'dd356056b0093e6fe2673faea27249b6ec4bd0ed03cd8d49fca0d824d9f2a62c' 
  AND token = 'rABk0wk/67mAgTy3I2OqsnPUSSChyzuvHl+mLGsbRNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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