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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa0ba5e8716eb9af7b820016cbecb204e78e3e8bbe2afea95df5bc807fda3410' 
  AND token = 'HTZ8HnK4/P1R5W/1tZU18+3nUgCiizeLLz9XG2eni+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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