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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '83f8faba159006bcd0a7cc39d7b4939b49ab9ae11be734be40a5e2eaf50f61d5' 
  AND token = 'yePQWBoqUBIeqIGJ1RKwEeGmPBuNKWToI+RJjG88HVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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